Which word with preposition fits

Broke out is the correct phrasal verb meaning a sudden start of something like a disease. This question tests knowledge of phrasal verbs in context. Break down means fail or collapse unsuitable here. Break off means to end abruptly not fitting an epidemic’s spread. Broke out accurately describes the rapid outbreak of the plague in London. Understanding phrasal verbs enhances sentence precision in English. The phrase’s historical context reflects epidemic descriptions in literature. Correct usage ensures clear communication in writing or speaking about sudden events like diseases or conflicts.